text: The lubricity of a substance is not a material property, and cannot be measured directly. Tests are performed to quantify a lubricants performance for a specific system. This is often done by determining how much wear is caused to a surface by a given wear-inducing object in a given amount of time. Other factors such as surface size, temperature, and pressure are also specified. For two fluids with the same viscosity, the one that results in a smaller wear scar is considered to have higher lubricity. For this reason, lubricity is also termed a substances anti-wear property.
  Examples of tribometer test setups include "Ball-on-cylinder" and "Ball-on-three-discs" tests.